import { Button, message, notification } from 'antd'
import React from 'react'
import { formatMessage } from 'umi-plugin-react/locale'
import defaultSettings from '../config/defaultSettings'

const { pwa } = defaultSettings // if pwa is true

if (pwa) {
  // Notify user if offline now
  window.addEventListener('sw.offline', () => {
    message.warning(
      formatMessage({
        id: 'app.pwa.offline'
      })
    )
  }) // Pop up a prompt on the page asking the user if they want to use the latest version

  window.addEventListener('sw.updated', event => {
    const e = event

    const reloadSW = async () => {
      // Check if there is sw whose state is waiting in ServiceWorkerRegistration
      // https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerRegistration
      const worker = e.detail && e.detail.waiting

      if (!worker) {
        return true
      } // Send skip-waiting event to waiting SW with MessageChannel

      await new Promise((resolve, reject) => {
        const channel = new MessageChannel()

        channel.port1.onmessage = msgEvent => {
          if (msgEvent.data.error) {
            reject(msgEvent.data.error)
          } else {
            resolve(msgEvent.data)
          }
        }

        worker.postMessage(
          {
            type: 'skip-waiting'
          },
          [channel.port2]
        )
      }) // Refresh current page to use the updated HTML and other assets after SW has skiped waiting

      window.location.reload(true)
      return true
    }

    const key = `open${Date.now()}`
    const btn = (
      <Button
        type="primary"
        onClick={() => {
          notification.close(key)
          reloadSW()
        }}
      >
        {formatMessage({
          id: 'app.pwa.serviceworker.updated.ok'
        })}
      </Button>
    )
    notification.open({
      message: formatMessage({
        id: 'app.pwa.serviceworker.updated'
      }),
      description: formatMessage({
        id: 'app.pwa.serviceworker.updated.hint'
      }),
      btn,
      key,
      onClose: async () => {}
    })
  })
} else if ('serviceWorker' in navigator) {
  // unregister service worker
  const { serviceWorker } = navigator

  if (serviceWorker.getRegistrations) {
    serviceWorker.getRegistrations().then(sws => {
      sws.forEach(sw => {
        sw.unregister()
      })
    })
  }

  serviceWorker.getRegistration().then(sw => {
    if (sw) sw.unregister()
  }) // remove all caches

  if (window.caches && window.caches.keys) {
    caches.keys().then(keys => {
      keys.forEach(key => {
        caches.delete(key)
      })
    })
  }
}
